1 /* 2 * Media Transfer Protocol implementation, backed by host filesystem. 3 * 4 * Copyright Red Hat, Inc 2014 5 * 6 * Author: 7 * Gerd Hoffmann <kraxel@redhat.com> 8 * 9 * This code is licensed under the GPL v2 or later. 10 */ 11 12 #include <wchar.h> 13 #include <dirent.h> 14 #include <unistd.h> 15 16 #include <sys/stat.h> 17 #include <sys/statvfs.h> 18 19 #include "qemu-common.h" 20 #include "qemu/iov.h" 21 #include "trace.h" 22 #include "hw/usb.h" 23 #include "hw/usb/desc.h" 24 25 /* ----------------------------------------------------------------------- */ 26 27 enum mtp_container_type { 28 TYPE_COMMAND = 1, 29 TYPE_DATA = 2, 30 TYPE_RESPONSE = 3, 31 TYPE_EVENT = 4, 32 }; 33 34 enum mtp_code { 35 /* command codes */ 36 CMD_GET_DEVICE_INFO = 0x1001, 37 CMD_OPEN_SESSION = 0x1002, 38 CMD_CLOSE_SESSION = 0x1003, 39 CMD_GET_STORAGE_IDS = 0x1004, 40 CMD_GET_STORAGE_INFO = 0x1005, 41 CMD_GET_NUM_OBJECTS = 0x1006, 42 CMD_GET_OBJECT_HANDLES = 0x1007, 43 CMD_GET_OBJECT_INFO = 0x1008, 44 CMD_GET_OBJECT = 0x1009, 45 CMD_GET_PARTIAL_OBJECT = 0x101b, 46 47 /* response codes */ 48 RES_OK = 0x2001, 49 RES_SESSION_NOT_OPEN = 0x2003, 50 RES_INVALID_TRANSACTION_ID = 0x2004, 51 RES_OPERATION_NOT_SUPPORTED = 0x2005, 52 RES_PARAMETER_NOT_SUPPORTED = 0x2006, 53 RES_INCOMPLETE_TRANSFER = 0x2007, 54 RES_INVALID_STORAGE_ID = 0x2008, 55 RES_INVALID_OBJECT_HANDLE = 0x2009, 56 RES_SPEC_BY_FORMAT_UNSUPPORTED = 0x2014, 57 RES_INVALID_PARENT_OBJECT = 0x201a, 58 RES_INVALID_PARAMETER = 0x201d, 59 RES_SESSION_ALREADY_OPEN = 0x201e, 60 61 /* format codes */ 62 FMT_UNDEFINED_OBJECT = 0x3000, 63 FMT_ASSOCIATION = 0x3001, 64 }; 65 66 typedef struct { 67 uint32_t length; 68 uint16_t type; 69 uint16_t code; 70 uint32_t trans; 71 } QEMU_PACKED mtp_container; 72 73 /* ----------------------------------------------------------------------- */ 74 75 typedef struct MTPState MTPState; 76 typedef struct MTPControl MTPControl; 77 typedef struct MTPData MTPData; 78 typedef struct MTPObject MTPObject; 79 80 enum { 81 EP_DATA_IN = 1, 82 EP_DATA_OUT, 83 EP_EVENT, 84 }; 85 86 struct MTPControl { 87 uint16_t code; 88 uint32_t trans; 89 int argc; 90 uint32_t argv[5]; 91 }; 92 93 struct MTPData { 94 uint16_t code; 95 uint32_t trans; 96 uint32_t offset; 97 uint32_t length; 98 uint32_t alloc; 99 uint8_t *data; 100 bool first; 101 int fd; 102 }; 103 104 struct MTPObject { 105 uint32_t handle; 106 uint16_t format; 107 char *name; 108 char *path; 109 struct stat stat; 110 MTPObject *parent; 111 MTPObject **children; 112 int32_t nchildren; 113 QTAILQ_ENTRY(MTPObject) next; 114 }; 115 116 struct MTPState { 117 USBDevice dev; 118 char *root; 119 char *desc; 120 uint32_t flags; 121 122 MTPData *data_in; 123 MTPData *data_out; 124 MTPControl *result; 125 uint32_t session; 126 uint32_t next_handle; 127 128 QTAILQ_HEAD(, MTPObject) objects; 129 }; 130 131 #define QEMU_STORAGE_ID 0x00010001 132 133 #define MTP_FLAG_WRITABLE 0 134 135 #define FLAG_SET(_mtp, _flag) ((_mtp)->flags & (1 << (_flag))) 136 137 /* ----------------------------------------------------------------------- */ 138 139 #define MTP_MANUFACTURER "QEMU" 140 #define MTP_PRODUCT "QEMU filesharing" 141 142 enum { 143 STR_MANUFACTURER = 1, 144 STR_PRODUCT, 145 STR_SERIALNUMBER, 146 STR_CONFIG_FULL, 147 STR_CONFIG_HIGH, 148 STR_CONFIG_SUPER, 149 }; 150 151 static const USBDescStrings desc_strings = { 152 [STR_MANUFACTURER] = MTP_MANUFACTURER, 153 [STR_PRODUCT] = MTP_PRODUCT, 154 [STR_SERIALNUMBER] = "34617", 155 [STR_CONFIG_FULL] = "Full speed config (usb 1.1)", 156 [STR_CONFIG_HIGH] = "High speed config (usb 2.0)", 157 [STR_CONFIG_SUPER] = "Super speed config (usb 3.0)", 158 }; 159 160 static const USBDescIface desc_iface_full = { 161 .bInterfaceNumber = 0, 162 .bNumEndpoints = 3, 163 .bInterfaceClass = USB_CLASS_STILL_IMAGE, 164 .bInterfaceSubClass = 0x01, 165 .bInterfaceProtocol = 0x01, 166 .eps = (USBDescEndpoint[]) { 167 { 168 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN, 169 .bmAttributes = USB_ENDPOINT_XFER_BULK, 170 .wMaxPacketSize = 64, 171 },{ 172 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT, 173 .bmAttributes = USB_ENDPOINT_XFER_BULK, 174 .wMaxPacketSize = 64, 175 },{ 176 .bEndpointAddress = USB_DIR_IN | EP_EVENT, 177 .bmAttributes = USB_ENDPOINT_XFER_INT, 178 .wMaxPacketSize = 8, 179 .bInterval = 0x0a, 180 }, 181 } 182 }; 183 184 static const USBDescDevice desc_device_full = { 185 .bcdUSB = 0x0200, 186 .bMaxPacketSize0 = 8, 187 .bNumConfigurations = 1, 188 .confs = (USBDescConfig[]) { 189 { 190 .bNumInterfaces = 1, 191 .bConfigurationValue = 1, 192 .iConfiguration = STR_CONFIG_FULL, 193 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP, 194 .bMaxPower = 2, 195 .nif = 1, 196 .ifs = &desc_iface_full, 197 }, 198 }, 199 }; 200 201 static const USBDescIface desc_iface_high = { 202 .bInterfaceNumber = 0, 203 .bNumEndpoints = 3, 204 .bInterfaceClass = USB_CLASS_STILL_IMAGE, 205 .bInterfaceSubClass = 0x01, 206 .bInterfaceProtocol = 0x01, 207 .eps = (USBDescEndpoint[]) { 208 { 209 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN, 210 .bmAttributes = USB_ENDPOINT_XFER_BULK, 211 .wMaxPacketSize = 512, 212 },{ 213 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT, 214 .bmAttributes = USB_ENDPOINT_XFER_BULK, 215 .wMaxPacketSize = 512, 216 },{ 217 .bEndpointAddress = USB_DIR_IN | EP_EVENT, 218 .bmAttributes = USB_ENDPOINT_XFER_INT, 219 .wMaxPacketSize = 8, 220 .bInterval = 0x0a, 221 }, 222 } 223 }; 224 225 static const USBDescDevice desc_device_high = { 226 .bcdUSB = 0x0200, 227 .bMaxPacketSize0 = 64, 228 .bNumConfigurations = 1, 229 .confs = (USBDescConfig[]) { 230 { 231 .bNumInterfaces = 1, 232 .bConfigurationValue = 1, 233 .iConfiguration = STR_CONFIG_HIGH, 234 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP, 235 .bMaxPower = 2, 236 .nif = 1, 237 .ifs = &desc_iface_high, 238 }, 239 }, 240 }; 241 242 static const USBDescMSOS desc_msos = { 243 .CompatibleID = "MTP", 244 .SelectiveSuspendEnabled = true, 245 }; 246 247 static const USBDesc desc = { 248 .id = { 249 .idVendor = 0x46f4, /* CRC16() of "QEMU" */ 250 .idProduct = 0x0004, 251 .bcdDevice = 0, 252 .iManufacturer = STR_MANUFACTURER, 253 .iProduct = STR_PRODUCT, 254 .iSerialNumber = STR_SERIALNUMBER, 255 }, 256 .full = &desc_device_full, 257 .high = &desc_device_high, 258 .str = desc_strings, 259 .msos = &desc_msos, 260 }; 261 262 /* ----------------------------------------------------------------------- */ 263 264 static MTPObject *usb_mtp_object_alloc(MTPState *s, uint32_t handle, 265 MTPObject *parent, char *name) 266 { 267 MTPObject *o = g_new0(MTPObject, 1); 268 269 if (name[0] == '.') { 270 goto ignore; 271 } 272 273 o->handle = handle; 274 o->parent = parent; 275 o->name = g_strdup(name); 276 o->nchildren = -1; 277 if (parent == NULL) { 278 o->path = g_strdup(name); 279 } else { 280 o->path = g_strdup_printf("%s/%s", parent->path, name); 281 } 282 283 if (lstat(o->path, &o->stat) != 0) { 284 goto ignore; 285 } 286 if (S_ISREG(o->stat.st_mode)) { 287 o->format = FMT_UNDEFINED_OBJECT; 288 } else if (S_ISDIR(o->stat.st_mode)) { 289 o->format = FMT_ASSOCIATION; 290 } else { 291 goto ignore; 292 } 293 294 if (access(o->path, R_OK) != 0) { 295 goto ignore; 296 } 297 298 trace_usb_mtp_object_alloc(s->dev.addr, o->handle, o->path); 299 300 QTAILQ_INSERT_TAIL(&s->objects, o, next); 301 return o; 302 303 ignore: 304 g_free(o->name); 305 g_free(o->path); 306 g_free(o); 307 return NULL; 308 } 309 310 static void usb_mtp_object_free(MTPState *s, MTPObject *o) 311 { 312 int i; 313 314 trace_usb_mtp_object_free(s->dev.addr, o->handle, o->path); 315 316 QTAILQ_REMOVE(&s->objects, o, next); 317 for (i = 0; i < o->nchildren; i++) { 318 usb_mtp_object_free(s, o->children[i]); 319 } 320 g_free(o->children); 321 g_free(o->name); 322 g_free(o->path); 323 g_free(o); 324 } 325 326 static MTPObject *usb_mtp_object_lookup(MTPState *s, uint32_t handle) 327 { 328 MTPObject *o; 329 330 QTAILQ_FOREACH(o, &s->objects, next) { 331 if (o->handle == handle) { 332 return o; 333 } 334 } 335 return NULL; 336 } 337 338 static void usb_mtp_object_readdir(MTPState *s, MTPObject *o) 339 { 340 struct dirent *entry; 341 DIR *dir; 342 343 o->nchildren = 0; 344 dir = opendir(o->path); 345 if (!dir) { 346 return; 347 } 348 while ((entry = readdir(dir)) != NULL) { 349 if ((o->nchildren % 32) == 0) { 350 o->children = g_realloc(o->children, 351 (o->nchildren + 32) * sizeof(MTPObject *)); 352 } 353 o->children[o->nchildren] = 354 usb_mtp_object_alloc(s, s->next_handle++, o, entry->d_name); 355 if (o->children[o->nchildren] != NULL) { 356 o->nchildren++; 357 } 358 } 359 closedir(dir); 360 } 361 362 /* ----------------------------------------------------------------------- */ 363 364 static MTPData *usb_mtp_data_alloc(MTPControl *c) 365 { 366 MTPData *data = g_new0(MTPData, 1); 367 368 data->code = c->code; 369 data->trans = c->trans; 370 data->fd = -1; 371 data->first = true; 372 return data; 373 } 374 375 static void usb_mtp_data_free(MTPData *data) 376 { 377 if (data == NULL) { 378 return; 379 } 380 if (data->fd != -1) { 381 close(data->fd); 382 } 383 g_free(data->data); 384 g_free(data); 385 } 386 387 static void usb_mtp_realloc(MTPData *data, uint32_t bytes) 388 { 389 if (data->length + bytes <= data->alloc) { 390 return; 391 } 392 data->alloc = (data->length + bytes + 0xff) & ~0xff; 393 data->data = g_realloc(data->data, data->alloc); 394 } 395 396 static void usb_mtp_add_u8(MTPData *data, uint8_t val) 397 { 398 usb_mtp_realloc(data, 1); 399 data->data[data->length++] = val; 400 } 401 402 static void usb_mtp_add_u16(MTPData *data, uint16_t val) 403 { 404 usb_mtp_realloc(data, 2); 405 data->data[data->length++] = (val >> 0) & 0xff; 406 data->data[data->length++] = (val >> 8) & 0xff; 407 } 408 409 static void usb_mtp_add_u32(MTPData *data, uint32_t val) 410 { 411 usb_mtp_realloc(data, 4); 412 data->data[data->length++] = (val >> 0) & 0xff; 413 data->data[data->length++] = (val >> 8) & 0xff; 414 data->data[data->length++] = (val >> 16) & 0xff; 415 data->data[data->length++] = (val >> 24) & 0xff; 416 } 417 418 static void usb_mtp_add_u64(MTPData *data, uint64_t val) 419 { 420 usb_mtp_realloc(data, 8); 421 data->data[data->length++] = (val >> 0) & 0xff; 422 data->data[data->length++] = (val >> 8) & 0xff; 423 data->data[data->length++] = (val >> 16) & 0xff; 424 data->data[data->length++] = (val >> 24) & 0xff; 425 data->data[data->length++] = (val >> 32) & 0xff; 426 data->data[data->length++] = (val >> 40) & 0xff; 427 data->data[data->length++] = (val >> 48) & 0xff; 428 data->data[data->length++] = (val >> 56) & 0xff; 429 } 430 431 static void usb_mtp_add_u16_array(MTPData *data, uint32_t len, 432 const uint16_t *vals) 433 { 434 int i; 435 436 usb_mtp_add_u32(data, len); 437 for (i = 0; i < len; i++) { 438 usb_mtp_add_u16(data, vals[i]); 439 } 440 } 441 442 static void usb_mtp_add_u32_array(MTPData *data, uint32_t len, 443 const uint32_t *vals) 444 { 445 int i; 446 447 usb_mtp_add_u32(data, len); 448 for (i = 0; i < len; i++) { 449 usb_mtp_add_u32(data, vals[i]); 450 } 451 } 452 453 static void usb_mtp_add_wstr(MTPData *data, const wchar_t *str) 454 { 455 uint32_t len = wcslen(str); 456 int i; 457 458 if (len > 0) { 459 len++; /* include terminating L'\0' */ 460 } 461 462 usb_mtp_add_u8(data, len); 463 for (i = 0; i < len; i++) { 464 usb_mtp_add_u16(data, str[i]); 465 } 466 } 467 468 static void usb_mtp_add_str(MTPData *data, const char *str) 469 { 470 uint32_t len = strlen(str)+1; 471 wchar_t wstr[len]; 472 size_t ret; 473 474 ret = mbstowcs(wstr, str, len); 475 if (ret == -1) { 476 usb_mtp_add_wstr(data, L"Oops"); 477 } else { 478 usb_mtp_add_wstr(data, wstr); 479 } 480 } 481 482 static void usb_mtp_add_time(MTPData *data, time_t time) 483 { 484 char buf[16]; 485 struct tm tm; 486 487 gmtime_r(&time, &tm); 488 strftime(buf, sizeof(buf), "%Y%m%dT%H%M%S", &tm); 489 usb_mtp_add_str(data, buf); 490 } 491 492 /* ----------------------------------------------------------------------- */ 493 494 static void usb_mtp_queue_result(MTPState *s, uint16_t code, uint32_t trans, 495 int argc, uint32_t arg0, uint32_t arg1) 496 { 497 MTPControl *c = g_new0(MTPControl, 1); 498 499 c->code = code; 500 c->trans = trans; 501 c->argc = argc; 502 if (argc > 0) { 503 c->argv[0] = arg0; 504 } 505 if (argc > 1) { 506 c->argv[1] = arg1; 507 } 508 509 assert(s->result == NULL); 510 s->result = c; 511 } 512 513 /* ----------------------------------------------------------------------- */ 514 515 static MTPData *usb_mtp_get_device_info(MTPState *s, MTPControl *c) 516 { 517 static const uint16_t ops[] = { 518 CMD_GET_DEVICE_INFO, 519 CMD_OPEN_SESSION, 520 CMD_CLOSE_SESSION, 521 CMD_GET_STORAGE_IDS, 522 CMD_GET_STORAGE_INFO, 523 CMD_GET_NUM_OBJECTS, 524 CMD_GET_OBJECT_HANDLES, 525 CMD_GET_OBJECT_INFO, 526 CMD_GET_OBJECT, 527 CMD_GET_PARTIAL_OBJECT, 528 }; 529 static const uint16_t fmt[] = { 530 FMT_UNDEFINED_OBJECT, 531 FMT_ASSOCIATION, 532 }; 533 MTPData *d = usb_mtp_data_alloc(c); 534 535 trace_usb_mtp_op_get_device_info(s->dev.addr); 536 537 usb_mtp_add_u16(d, 100); 538 usb_mtp_add_u32(d, 0xffffffff); 539 usb_mtp_add_u16(d, 0x0101); 540 usb_mtp_add_wstr(d, L""); 541 usb_mtp_add_u16(d, 0x0000); 542 543 usb_mtp_add_u16_array(d, ARRAY_SIZE(ops), ops); 544 usb_mtp_add_u16_array(d, 0, NULL); 545 usb_mtp_add_u16_array(d, 0, NULL); 546 usb_mtp_add_u16_array(d, 0, NULL); 547 usb_mtp_add_u16_array(d, ARRAY_SIZE(fmt), fmt); 548 549 usb_mtp_add_wstr(d, L"" MTP_MANUFACTURER); 550 usb_mtp_add_wstr(d, L"" MTP_PRODUCT); 551 usb_mtp_add_wstr(d, L"0.1"); 552 usb_mtp_add_wstr(d, L"0123456789abcdef0123456789abcdef"); 553 554 return d; 555 } 556 557 static MTPData *usb_mtp_get_storage_ids(MTPState *s, MTPControl *c) 558 { 559 static const uint32_t ids[] = { 560 QEMU_STORAGE_ID, 561 }; 562 MTPData *d = usb_mtp_data_alloc(c); 563 564 trace_usb_mtp_op_get_storage_ids(s->dev.addr); 565 566 usb_mtp_add_u32_array(d, ARRAY_SIZE(ids), ids); 567 568 return d; 569 } 570 571 static MTPData *usb_mtp_get_storage_info(MTPState *s, MTPControl *c) 572 { 573 MTPData *d = usb_mtp_data_alloc(c); 574 struct statvfs buf; 575 int rc; 576 577 trace_usb_mtp_op_get_storage_info(s->dev.addr); 578 579 if (FLAG_SET(s, MTP_FLAG_WRITABLE)) { 580 usb_mtp_add_u16(d, 0x0003); 581 usb_mtp_add_u16(d, 0x0002); 582 usb_mtp_add_u16(d, 0x0000); 583 } else { 584 usb_mtp_add_u16(d, 0x0001); 585 usb_mtp_add_u16(d, 0x0002); 586 usb_mtp_add_u16(d, 0x0001); 587 } 588 589 rc = statvfs(s->root, &buf); 590 if (rc == 0) { 591 usb_mtp_add_u64(d, (uint64_t)buf.f_frsize * buf.f_blocks); 592 usb_mtp_add_u64(d, (uint64_t)buf.f_bavail * buf.f_blocks); 593 usb_mtp_add_u32(d, buf.f_ffree); 594 } else { 595 usb_mtp_add_u64(d, 0xffffffff); 596 usb_mtp_add_u64(d, 0xffffffff); 597 usb_mtp_add_u32(d, 0xffffffff); 598 } 599 600 usb_mtp_add_str(d, s->desc); 601 usb_mtp_add_wstr(d, L"123456789abcdef"); 602 return d; 603 } 604 605 static MTPData *usb_mtp_get_object_handles(MTPState *s, MTPControl *c, 606 MTPObject *o) 607 { 608 MTPData *d = usb_mtp_data_alloc(c); 609 uint32_t i, handles[o->nchildren]; 610 611 trace_usb_mtp_op_get_object_handles(s->dev.addr, o->handle, o->path); 612 613 for (i = 0; i < o->nchildren; i++) { 614 handles[i] = o->children[i]->handle; 615 } 616 usb_mtp_add_u32_array(d, o->nchildren, handles); 617 618 return d; 619 } 620 621 static MTPData *usb_mtp_get_object_info(MTPState *s, MTPControl *c, 622 MTPObject *o) 623 { 624 MTPData *d = usb_mtp_data_alloc(c); 625 626 trace_usb_mtp_op_get_object_info(s->dev.addr, o->handle, o->path); 627 628 usb_mtp_add_u32(d, QEMU_STORAGE_ID); 629 usb_mtp_add_u16(d, o->format); 630 usb_mtp_add_u16(d, 0); 631 usb_mtp_add_u32(d, o->stat.st_size); 632 633 usb_mtp_add_u16(d, 0); 634 usb_mtp_add_u32(d, 0); 635 usb_mtp_add_u32(d, 0); 636 usb_mtp_add_u32(d, 0); 637 usb_mtp_add_u32(d, 0); 638 usb_mtp_add_u32(d, 0); 639 usb_mtp_add_u32(d, 0); 640 641 if (o->parent) { 642 usb_mtp_add_u32(d, o->parent->handle); 643 } else { 644 usb_mtp_add_u32(d, 0); 645 } 646 if (o->format == FMT_ASSOCIATION) { 647 usb_mtp_add_u16(d, 0x0001); 648 usb_mtp_add_u32(d, 0x00000001); 649 usb_mtp_add_u32(d, 0); 650 } else { 651 usb_mtp_add_u16(d, 0); 652 usb_mtp_add_u32(d, 0); 653 usb_mtp_add_u32(d, 0); 654 } 655 656 usb_mtp_add_str(d, o->name); 657 usb_mtp_add_time(d, o->stat.st_ctime); 658 usb_mtp_add_time(d, o->stat.st_mtime); 659 usb_mtp_add_wstr(d, L""); 660 661 return d; 662 } 663 664 static MTPData *usb_mtp_get_object(MTPState *s, MTPControl *c, 665 MTPObject *o) 666 { 667 MTPData *d = usb_mtp_data_alloc(c); 668 669 trace_usb_mtp_op_get_object(s->dev.addr, o->handle, o->path); 670 671 d->fd = open(o->path, O_RDONLY); 672 if (d->fd == -1) { 673 usb_mtp_data_free(d); 674 return NULL; 675 } 676 d->length = o->stat.st_size; 677 d->alloc = 512; 678 d->data = g_malloc(d->alloc); 679 return d; 680 } 681 682 static MTPData *usb_mtp_get_partial_object(MTPState *s, MTPControl *c, 683 MTPObject *o) 684 { 685 MTPData *d = usb_mtp_data_alloc(c); 686 off_t offset; 687 688 trace_usb_mtp_op_get_partial_object(s->dev.addr, o->handle, o->path, 689 c->argv[1], c->argv[2]); 690 691 d->fd = open(o->path, O_RDONLY); 692 if (d->fd == -1) { 693 usb_mtp_data_free(d); 694 return NULL; 695 } 696 697 offset = c->argv[1]; 698 if (offset > o->stat.st_size) { 699 offset = o->stat.st_size; 700 } 701 lseek(d->fd, offset, SEEK_SET); 702 703 d->length = c->argv[2]; 704 if (d->length > o->stat.st_size - offset) { 705 d->length = o->stat.st_size - offset; 706 } 707 708 return d; 709 } 710 711 static void usb_mtp_command(MTPState *s, MTPControl *c) 712 { 713 MTPData *data_in = NULL; 714 MTPObject *o; 715 uint32_t nres = 0, res0 = 0; 716 717 /* sanity checks */ 718 if (c->code >= CMD_CLOSE_SESSION && s->session == 0) { 719 usb_mtp_queue_result(s, RES_SESSION_NOT_OPEN, 720 c->trans, 0, 0, 0); 721 return; 722 } 723 724 /* process commands */ 725 switch (c->code) { 726 case CMD_GET_DEVICE_INFO: 727 data_in = usb_mtp_get_device_info(s, c); 728 break; 729 case CMD_OPEN_SESSION: 730 if (s->session) { 731 usb_mtp_queue_result(s, RES_SESSION_ALREADY_OPEN, 732 c->trans, 1, s->session, 0); 733 return; 734 } 735 if (c->argv[0] == 0) { 736 usb_mtp_queue_result(s, RES_INVALID_PARAMETER, 737 c->trans, 0, 0, 0); 738 return; 739 } 740 trace_usb_mtp_op_open_session(s->dev.addr); 741 s->session = c->argv[0]; 742 usb_mtp_object_alloc(s, s->next_handle++, NULL, s->root); 743 break; 744 case CMD_CLOSE_SESSION: 745 trace_usb_mtp_op_close_session(s->dev.addr); 746 s->session = 0; 747 s->next_handle = 0; 748 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects)); 749 assert(QTAILQ_EMPTY(&s->objects)); 750 break; 751 case CMD_GET_STORAGE_IDS: 752 data_in = usb_mtp_get_storage_ids(s, c); 753 break; 754 case CMD_GET_STORAGE_INFO: 755 if (c->argv[0] != QEMU_STORAGE_ID && 756 c->argv[0] != 0xffffffff) { 757 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID, 758 c->trans, 0, 0, 0); 759 return; 760 } 761 data_in = usb_mtp_get_storage_info(s, c); 762 break; 763 case CMD_GET_NUM_OBJECTS: 764 case CMD_GET_OBJECT_HANDLES: 765 if (c->argv[0] != QEMU_STORAGE_ID && 766 c->argv[0] != 0xffffffff) { 767 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID, 768 c->trans, 0, 0, 0); 769 return; 770 } 771 if (c->argv[1] != 0x00000000) { 772 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED, 773 c->trans, 0, 0, 0); 774 return; 775 } 776 if (c->argv[2] == 0x00000000 || 777 c->argv[2] == 0xffffffff) { 778 o = QTAILQ_FIRST(&s->objects); 779 } else { 780 o = usb_mtp_object_lookup(s, c->argv[2]); 781 } 782 if (o == NULL) { 783 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 784 c->trans, 0, 0, 0); 785 return; 786 } 787 if (o->format != FMT_ASSOCIATION) { 788 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, 789 c->trans, 0, 0, 0); 790 return; 791 } 792 if (o->nchildren == -1) { 793 usb_mtp_object_readdir(s, o); 794 } 795 if (c->code == CMD_GET_NUM_OBJECTS) { 796 trace_usb_mtp_op_get_num_objects(s->dev.addr, o->handle, o->path); 797 nres = 1; 798 res0 = o->nchildren; 799 } else { 800 data_in = usb_mtp_get_object_handles(s, c, o); 801 } 802 break; 803 case CMD_GET_OBJECT_INFO: 804 o = usb_mtp_object_lookup(s, c->argv[0]); 805 if (o == NULL) { 806 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 807 c->trans, 0, 0, 0); 808 return; 809 } 810 data_in = usb_mtp_get_object_info(s, c, o); 811 break; 812 case CMD_GET_OBJECT: 813 o = usb_mtp_object_lookup(s, c->argv[0]); 814 if (o == NULL) { 815 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 816 c->trans, 0, 0, 0); 817 return; 818 } 819 if (o->format == FMT_ASSOCIATION) { 820 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 821 c->trans, 0, 0, 0); 822 return; 823 } 824 data_in = usb_mtp_get_object(s, c, o); 825 if (NULL == data_in) { 826 fprintf(stderr, "%s: TODO: handle error\n", __func__); 827 } 828 break; 829 case CMD_GET_PARTIAL_OBJECT: 830 o = usb_mtp_object_lookup(s, c->argv[0]); 831 if (o == NULL) { 832 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 833 c->trans, 0, 0, 0); 834 return; 835 } 836 if (o->format == FMT_ASSOCIATION) { 837 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 838 c->trans, 0, 0, 0); 839 return; 840 } 841 data_in = usb_mtp_get_partial_object(s, c, o); 842 if (NULL == data_in) { 843 fprintf(stderr, "%s: TODO: handle error\n", __func__); 844 } 845 nres = 1; 846 res0 = data_in->length; 847 break; 848 default: 849 trace_usb_mtp_op_unknown(s->dev.addr, c->code); 850 usb_mtp_queue_result(s, RES_OPERATION_NOT_SUPPORTED, 851 c->trans, 0, 0, 0); 852 return; 853 } 854 855 /* return results on success */ 856 if (data_in) { 857 assert(s->data_in == NULL); 858 s->data_in = data_in; 859 } 860 usb_mtp_queue_result(s, RES_OK, c->trans, nres, res0, 0); 861 } 862 863 /* ----------------------------------------------------------------------- */ 864 865 static void usb_mtp_handle_reset(USBDevice *dev) 866 { 867 MTPState *s = DO_UPCAST(MTPState, dev, dev); 868 869 trace_usb_mtp_reset(s->dev.addr); 870 871 s->session = 0; 872 usb_mtp_data_free(s->data_in); 873 s->data_in = NULL; 874 usb_mtp_data_free(s->data_out); 875 s->data_out = NULL; 876 g_free(s->result); 877 s->result = NULL; 878 } 879 880 static void usb_mtp_handle_control(USBDevice *dev, USBPacket *p, 881 int request, int value, int index, 882 int length, uint8_t *data) 883 { 884 int ret; 885 886 ret = usb_desc_handle_control(dev, p, request, value, index, length, data); 887 if (ret >= 0) { 888 return; 889 } 890 891 trace_usb_mtp_stall(dev->addr, "unknown control request"); 892 p->status = USB_RET_STALL; 893 } 894 895 static void usb_mtp_cancel_packet(USBDevice *dev, USBPacket *p) 896 { 897 /* we don't use async packets, so this should never be called */ 898 fprintf(stderr, "%s\n", __func__); 899 } 900 901 static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p) 902 { 903 MTPState *s = DO_UPCAST(MTPState, dev, dev); 904 MTPControl cmd; 905 mtp_container container; 906 uint32_t params[5]; 907 int i, rc; 908 909 switch (p->ep->nr) { 910 case EP_DATA_IN: 911 if (s->data_out != NULL) { 912 /* guest bug */ 913 trace_usb_mtp_stall(s->dev.addr, "awaiting data-out"); 914 p->status = USB_RET_STALL; 915 return; 916 } 917 if (p->iov.size < sizeof(container)) { 918 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 919 p->status = USB_RET_STALL; 920 return; 921 } 922 if (s->data_in != NULL) { 923 MTPData *d = s->data_in; 924 int dlen = d->length - d->offset; 925 if (d->first) { 926 trace_usb_mtp_data_in(s->dev.addr, d->trans, d->length); 927 container.length = cpu_to_le32(d->length + sizeof(container)); 928 container.type = cpu_to_le16(TYPE_DATA); 929 container.code = cpu_to_le16(d->code); 930 container.trans = cpu_to_le32(d->trans); 931 usb_packet_copy(p, &container, sizeof(container)); 932 d->first = false; 933 if (dlen > p->iov.size - sizeof(container)) { 934 dlen = p->iov.size - sizeof(container); 935 } 936 } else { 937 if (dlen > p->iov.size) { 938 dlen = p->iov.size; 939 } 940 } 941 if (d->fd == -1) { 942 usb_packet_copy(p, d->data + d->offset, dlen); 943 } else { 944 if (d->alloc < p->iov.size) { 945 d->alloc = p->iov.size; 946 d->data = g_realloc(d->data, d->alloc); 947 } 948 rc = read(d->fd, d->data, dlen); 949 if (rc != dlen) { 950 memset(d->data, 0, dlen); 951 s->result->code = RES_INCOMPLETE_TRANSFER; 952 } 953 usb_packet_copy(p, d->data, dlen); 954 } 955 d->offset += dlen; 956 if (d->offset == d->length) { 957 usb_mtp_data_free(s->data_in); 958 s->data_in = NULL; 959 } 960 } else if (s->result != NULL) { 961 MTPControl *r = s->result; 962 int length = sizeof(container) + r->argc * sizeof(uint32_t); 963 if (r->code == RES_OK) { 964 trace_usb_mtp_success(s->dev.addr, r->trans, 965 (r->argc > 0) ? r->argv[0] : 0, 966 (r->argc > 1) ? r->argv[1] : 0); 967 } else { 968 trace_usb_mtp_error(s->dev.addr, r->code, r->trans, 969 (r->argc > 0) ? r->argv[0] : 0, 970 (r->argc > 1) ? r->argv[1] : 0); 971 } 972 container.length = cpu_to_le32(length); 973 container.type = cpu_to_le16(TYPE_RESPONSE); 974 container.code = cpu_to_le16(r->code); 975 container.trans = cpu_to_le32(r->trans); 976 for (i = 0; i < r->argc; i++) { 977 params[i] = cpu_to_le32(r->argv[i]); 978 } 979 usb_packet_copy(p, &container, sizeof(container)); 980 usb_packet_copy(p, ¶ms, length - sizeof(container)); 981 g_free(s->result); 982 s->result = NULL; 983 } 984 break; 985 case EP_DATA_OUT: 986 if (p->iov.size < sizeof(container)) { 987 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 988 p->status = USB_RET_STALL; 989 return; 990 } 991 usb_packet_copy(p, &container, sizeof(container)); 992 switch (le16_to_cpu(container.type)) { 993 case TYPE_COMMAND: 994 if (s->data_in || s->data_out || s->result) { 995 trace_usb_mtp_stall(s->dev.addr, "transaction inflight"); 996 p->status = USB_RET_STALL; 997 return; 998 } 999 cmd.code = le16_to_cpu(container.code); 1000 cmd.argc = (le32_to_cpu(container.length) - sizeof(container)) 1001 / sizeof(uint32_t); 1002 cmd.trans = le32_to_cpu(container.trans); 1003 if (cmd.argc > ARRAY_SIZE(cmd.argv)) { 1004 cmd.argc = ARRAY_SIZE(cmd.argv); 1005 } 1006 if (p->iov.size < sizeof(container) + cmd.argc * sizeof(uint32_t)) { 1007 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1008 p->status = USB_RET_STALL; 1009 return; 1010 } 1011 usb_packet_copy(p, ¶ms, cmd.argc * sizeof(uint32_t)); 1012 for (i = 0; i < cmd.argc; i++) { 1013 cmd.argv[i] = le32_to_cpu(params[i]); 1014 } 1015 trace_usb_mtp_command(s->dev.addr, cmd.code, cmd.trans, 1016 (cmd.argc > 0) ? cmd.argv[0] : 0, 1017 (cmd.argc > 1) ? cmd.argv[1] : 0, 1018 (cmd.argc > 2) ? cmd.argv[2] : 0, 1019 (cmd.argc > 3) ? cmd.argv[3] : 0, 1020 (cmd.argc > 4) ? cmd.argv[4] : 0); 1021 usb_mtp_command(s, &cmd); 1022 break; 1023 default: 1024 /* not needed as long as the mtp device is read-only */ 1025 p->status = USB_RET_STALL; 1026 return; 1027 } 1028 break; 1029 case EP_EVENT: 1030 p->status = USB_RET_NAK; 1031 return; 1032 default: 1033 trace_usb_mtp_stall(s->dev.addr, "invalid endpoint"); 1034 p->status = USB_RET_STALL; 1035 return; 1036 } 1037 1038 if (p->actual_length == 0) { 1039 trace_usb_mtp_nak(s->dev.addr, p->ep->nr); 1040 p->status = USB_RET_NAK; 1041 return; 1042 } else { 1043 trace_usb_mtp_xfer(s->dev.addr, p->ep->nr, p->actual_length, 1044 p->iov.size); 1045 return; 1046 } 1047 } 1048 1049 static int usb_mtp_initfn(USBDevice *dev) 1050 { 1051 MTPState *s = DO_UPCAST(MTPState, dev, dev); 1052 1053 usb_desc_create_serial(dev); 1054 usb_desc_init(dev); 1055 QTAILQ_INIT(&s->objects); 1056 if (s->desc == NULL) { 1057 s->desc = strrchr(s->root, '/'); 1058 if (s->desc && s->desc[0]) { 1059 s->desc = g_strdup(s->desc + 1); 1060 } else { 1061 s->desc = g_strdup("none"); 1062 } 1063 } 1064 return 0; 1065 } 1066 1067 static const VMStateDescription vmstate_usb_mtp = { 1068 .name = "usb-mtp", 1069 .unmigratable = 1, 1070 .version_id = 1, 1071 .minimum_version_id = 1, 1072 .fields = (VMStateField[]) { 1073 VMSTATE_USB_DEVICE(dev, MTPState), 1074 VMSTATE_END_OF_LIST() 1075 } 1076 }; 1077 1078 static Property mtp_properties[] = { 1079 DEFINE_PROP_STRING("root", MTPState, root), 1080 DEFINE_PROP_STRING("desc", MTPState, desc), 1081 DEFINE_PROP_END_OF_LIST(), 1082 }; 1083 1084 static void usb_mtp_class_initfn(ObjectClass *klass, void *data) 1085 { 1086 DeviceClass *dc = DEVICE_CLASS(klass); 1087 USBDeviceClass *uc = USB_DEVICE_CLASS(klass); 1088 1089 uc->init = usb_mtp_initfn; 1090 uc->product_desc = "QEMU USB MTP"; 1091 uc->usb_desc = &desc; 1092 uc->cancel_packet = usb_mtp_cancel_packet; 1093 uc->handle_attach = usb_desc_attach; 1094 uc->handle_reset = usb_mtp_handle_reset; 1095 uc->handle_control = usb_mtp_handle_control; 1096 uc->handle_data = usb_mtp_handle_data; 1097 dc->fw_name = "mtp"; 1098 dc->vmsd = &vmstate_usb_mtp; 1099 dc->props = mtp_properties; 1100 } 1101 1102 static TypeInfo mtp_info = { 1103 .name = "usb-mtp", 1104 .parent = TYPE_USB_DEVICE, 1105 .instance_size = sizeof(MTPState), 1106 .class_init = usb_mtp_class_initfn, 1107 }; 1108 1109 static void usb_mtp_register_types(void) 1110 { 1111 type_register_static(&mtp_info); 1112 } 1113 1114 type_init(usb_mtp_register_types) 1115